Radial and Vertical Variation in Stem Properties of Juvenile Black Locust (<i>Robinia Pseudoacacia</i>)

Authors

  • Jeffrey W. Stringer
  • James R. Olson

Keywords:

Black locust, juvenile wood, specific gravity, fiber length, extractive content

Abstract

Ten 10- to 12-year-old black locust (Robinia pseudoacacia L.) trees from two sites were analyzed to determine the within-tree variation (radially and vertically) and the between-site variation of selected wood properties. Specific gravity, fiber length, and extractive content exhibited significant radial variation for samples taken at breast height. Specific gravity increased radially from 0.57 near the pith to 0.68 near the cambium. Fiber length also increased radially from 0.75 mm (pith) to 1.06 mm (cambium). Radial variation was also exhibited by benzene-EtOH and total extractive content. Sap-wood tissue possessed the lowest benzene-EtOH content (2.70%) and total extractive content (6.81%), while the outer heartwood tissue maintained the highest extractive levels, 4.60% and 8.54%, respectively. Vertical stem analysis of samples obtained at intervals of 20% of the total-tree height showed a positive relationship with height, for ash content and hot-water extractive content, and a negative relationship with height for fiber length and benzene-EtOH extractive content. Stem tissue was composed of 84.7% wood and 15.3% bark. Mean heartwood content was 54.1%. Total stem-wood fiber length, specific gravity, and total extractive content averaged 1.05 mm, 0.68 and 7.32%, respectively. Nonextracted specific gravity was the only property differing significantly between sites averaging 0.69 and 0.66 for the two sites.

References

Bendtsen, B. A. 1978. Properties of wood from improved and intensively managed trees. For. Prod. J. 28:61-72.nCarll, C., W. Eslyn, G. Myers, W. Brewer, and D. Staton. 1985. Evaluation of black locust (R. pseudoacacia) as raw material for wet-process hardboard. For. Prod. J. 35:11-17.nCarpenter, S. B., and R. A. Eigel. 1979. Reclaiming southern Appalachian surface mines with black locust fuel plantations. In Proceedings Fourth Annual Meeting Canadian Land Reclamation Association. Sudbury, Canada. Aug. Pp. 239-253.nEzell, A. W., and P. E. Schilling. 1979. Within-tree variation of fiber length in sweetgum (Liquidambar styraciflua L.) in Louisiana. Wood Sci. 11:252-256.nFoster, G. S., and E. Thor. 1979. Variation in juvenile wood of American sycamore (Platanus occidentalis L.) in Tennessee. Wood Sci. 11:188-192.nHart, J. H. 1968. Morphological and chemical differences between sapwood, discolored sapwood, and heartwood in black locust and osage orange. For. Sci. 14:334-338.nJourdain, C. J., and J. R. Olson. 1984. Wood property variation among forty-eight families of American sycamore. Wood Fiber Sci. 16:498-507.nKereszleski, B. 1981. The black locust. Unasylva 32(127):23-33.nManwiller, F. G. 1979. Wood and bark specific gravity of small-diameter pine-site hardwoods in the south. Wood Sci. 11:234-240.nNeenan, M., and K. Steinbeck. 1979. Caloric values for young sprouts of nine hardwood species. For. Sci. 25:455-461.nPanshin, A. J., and C. deZeeuw. 1980. Textbook of wood technology, 4th ed., Vol. 1. McGraw-Hill Book Co., N.Y.nRitter, G. J., and L. C. Fleck. 1926. Chemistry of wood: VIII—Further studies of sapwood and heartwood. Indust. Eng. Chem. 18:576-577.nSenft, J. F., B. A. Bendtsen, and W. L. Galligan. 1985. Weak wood: Fast-grown trees make problem lumber. J. For. 83:476-484.nStringer, J. W., and S. B. Carpenter. 1982. Energy content of black locust growing on surface mined land. Pages 243-248 in D. H. Graves, ed. Proceedings 1982 Symposium on Surface Mining Hydrology, Sedimentology and Reclamation. Lexington, KY. Dec. 5-10.nStringer, J. W., J. R. Olson, and S. B. Carpenter. 1982. Variation in wood properties of nine black locust clones. Pages 166-171 in B. A. Thielges, ed. Proceedings 7th North American Forest Biology Workshop. Lexington, KY. July 26-28.nTAPPI. 1968. Preparation of wood for chemical analysis. Standard T12 05-75. TAPPI, At-lanta, GA.nTaylor, F. W. 1979. Property variation within stems of selected hardwoods growing in the mid-south. Wood Sci. 11:193-199.nUSDA Forest Products Laboratory. 1978. Wood handbook. USDA Agr. Handbk. 72.nWahlgren, H. E., and D. O. Yandle. 1970. Development of a model for estimating tree specific gravity of loblolly pine. Wood Sci. 2:129-135.n

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Published

2007-06-28

Issue

Number 1 / January 1987

Section

Research Contributions

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